Touch-Programmable Metasurface for Various Electromagnetic Manipulations and Encryptions.

Area of Science:

• Metasurface technology
• Electromagnetic (EM) manipulation
• Sensor integration

Background:

• Traditional programmable metasurfaces rely on external Field Programmable Gate Arrays (FPGAs) for control.
• FPGA-based control systems often require complex computer inputs or pre-loaded algorithms, making them cumbersome.
• Existing methods present challenges in user-friendliness and direct manipulation of metasurface functionalities.

Purpose of the Study:

• To propose a simplified and user-friendly programmable metasurface (TPM).
• To enable direct, touch-based control of metasurface functionalities.
• To achieve diverse electromagnetic (EM) manipulations and information encryptions without external control modules.

Main Methods:

• Development of a touch-programmable metasurface (TPM) integrated with touch sensing modules.
• Utilizing direct touch interaction to alter the state of integrated diodes within meta-units.
• Demonstrating various coding patterns for scattering-field control and near-field EM information encryption.

Main Results:

• The TPM allows independent and direct manipulation of individual meta-units via touch.
• Efficient input of coding patterns is achieved without FPGAs or other complex control modules.
• Demonstrated feasibility of diverse scattering-field control and flexible near-field EM information encryptions.

Conclusions:

• The proposed touch-programmable metasurface (TPM) offers a simplified and intuitive approach to EM manipulation.
• TPM technology eliminates the need for cumbersome external control systems, enhancing usability.
• The TPM shows significant potential for applications in imaging displays, wireless communications, and EM information encryption.